Re:APFS changes in Big Sur: how Time Machine backs up to APFS
by DavidSJ on Tuesday September 29, 2020 @07:55AM
(#24626566)
I've made a top-level post at https://news.ycombinator.com/item?id=24626562 (edit: and tweeted it at https://twitter.com/TheDavidSJ/status/1310912175934902272).
Along with iPhone iTunes Backup Corruption issues which is still not fixed. But it is hard to provide any evidence other than personal experience.